package cn.edu.sdjzu.xg.bysj.service;

import cn.edu.sdjzu.xg.bysj.dao.GraduateProjectStatusDao;
import cn.edu.sdjzu.xg.bysj.domain.GraduateProjectStatus;
import util.JdbcHelper;
import util.Pagination;

import java.sql.Connection;
import java.sql.SQLException;
import java.util.Collection;
import java.util.List;

public final class GraduateProjectStatusService {
	private GraduateProjectStatusDao graduateProjectStatusDao =
			GraduateProjectStatusDao.getInstance();
	//本类的一个对象引用，保存自身对象
	private static GraduateProjectStatusService graduateProjectStatusService =
			new GraduateProjectStatusService();
	//私有的构造方法，防止其它类创建它的对象
	private GraduateProjectStatusService(){}
	//静态方法，返回本类的惟一对象
	public synchronized static GraduateProjectStatusService getInstance() {

		return graduateProjectStatusService;
	}
	public Collection<GraduateProjectStatus> findAll(List conditionList,
													   Pagination pagination) throws SQLException {
		Connection connection = JdbcHelper.getConn();
		Collection<GraduateProjectStatus> graduateProjectStatus =
				graduateProjectStatusDao.findAll(conditionList,pagination,connection) ;
		JdbcHelper.close(connection);
		return graduateProjectStatus;
	}

	public GraduateProjectStatus find(Integer id) throws SQLException {
		Connection connection = JdbcHelper.getConn();
		GraduateProjectStatus graduateProjectStatus = graduateProjectStatusDao.find(id,connection);
		JdbcHelper.close(connection);
		return graduateProjectStatus;
	}

	public boolean update(GraduateProjectStatus graduateProjectStatus) throws SQLException {
		Connection connection = JdbcHelper.getConn();
		//将自动提交设为false,开始事务
		connection.setAutoCommit(false);
		Boolean updated =false;
		try {
			//增加用户
			updated = graduateProjectStatusDao.update(graduateProjectStatus,connection);
			//提交事务
			connection.commit();

		}catch (Exception e){
			//回滚
			connection.rollback();

		}finally {
			//将自动提交设为true，结束事务
			connection.setAutoCommit(true);
			JdbcHelper.close(connection);
		}
		return updated ;
	}

	public boolean add(GraduateProjectStatus graduateProjectStatus) throws SQLException {
		Connection connection = JdbcHelper.getConn();
		//将自动提交设为false,开始事务
		connection.setAutoCommit(false);
		Boolean added =false;
		try {
			//增加用户
			added = graduateProjectStatusDao.add(graduateProjectStatus,connection);
			//提交事务
			connection.commit();

		}catch (Exception e){
			//回滚
			connection.rollback();

		}finally {
			//将自动提交设为true，结束事务
			connection.setAutoCommit(true);
			JdbcHelper.close(connection);
		}
		return added ;
	}
	public boolean delete(Integer id) throws SQLException{
		Connection connection = JdbcHelper.getConn();
		//将自动提交设为false,开始事务
		connection.setAutoCommit(false);
		Boolean deleted =false;
		try {
			//增加用户
			deleted = graduateProjectStatusDao.delete(id,connection);
			//提交事务
			connection.commit();

		}catch (Exception e){
			//回滚
			connection.rollback();

		}finally {
			//将自动提交设为true，结束事务
			connection.setAutoCommit(true);
			JdbcHelper.close(connection);
		}
		return deleted ;
	}

}
